books.google.com.ph - The author explains the social and cultural contexts of usig, pasma, kulam, and other folk illnesses in the Philippines....https://books.google.com.ph/books/about/Revisiting_Usog_Pasma_Kulam.html?id=EktzHrfup1UC&utm_source=gb-gplus-shareRevisiting Usog, Pasma, Kulam